Mississippi Marshmallow 

The sexual act of inserting a marshmallow into a woman's vagina, then extracting and eating the marshmallow. Can be done with multiple marshmallows or any size (regular, Jumbo, mini, etc.).

My girl was just begging me for a Mississippi Marshmallow, but we were all out.

Hey dude, I saw Matzek giving you're girl a Mississippi Marshmallow on a pool table at Shotts's party.

Mississippi Marshmallow by Sammy Slut Socks April 10, 2011

soggy marshmallow 

When your girl wants to fuck and is really wet but you are flaccid so you kinda just grind up against each other.

Yeah so my girl totally wanted to fuck last night but i couldn't get it up so i just gave her a soggy marshmallow and went to bed.

soggy marshmallow by kokapuff August 27, 2015

marshmallow 

a person who is a wuss or a sissy. also one who is gullible and often described as a goody two shoes.

Example 1-
person 1: "eeww i saw you and your girlfriend kiss yesterday!"
person 2: "oh, shut up, you marshmallow."

Example 2-
person 1: "OMG that guy in the movie just chopped off that guy's head!!!"
person 2: "stop being such a marshmallow; it's just a movie."

marshmallow by smiley_chica May 5, 2010

like putting a marshmallow in a piggy bank 

When an old man marries a young woman one could say it is "like putting a marshmallow in a piggy bank", insinuating that the man cannot get an erection so it will not go in a young tight pussy.

Did you know old man jones married that hot stripper? It must be like putting a marshmallow in a piggy bank.

like putting a marshmallow in a piggy bank by tl_terry January 22, 2010

Marshmallow Fucking 

When the penis goes soft and the man feels the need to continue to fuck the female.

So this guy and I were fucking when he prematurely went soft and it felt like I was being fucked with a marshmallow ... hence the term ... Marshmallow Fucking ...

Marshmallow Fucking by Shaded Beauty August 1, 2010

Marshmallow Style 

Marshmallow style involves oral sex and a hot marshmallow. To preform "marshmallow style" you need to roast a marshmallow over an open fire, it can be a little burnt (if you're into that kinda thing) and then immediately put it in your mouth and go down on someone.

While camping with Chrissy, she marshmallow styled the hell out of me. It was the tits!

Marshmallow Style by Whiskeydick December 6, 2012

marshmallow 

I perfect treat when at camp.

Marshmallows are going to take over the white house!

marshmallow by Amish Kid July 13, 2004